【摘要】 介绍了电容型设备绝缘参数在线监测系统的原理 ,分析了监测系统的介损测量结果 ,阐述了电流传感器的温度特性对介损测量数据的影响 ,归纳出了电容型设备在线监测数据的分析方法。该监测系统对北京地区 1座 5 0 0 k V和 8座 2 2 0 k V电压等级变电站 2年的监测表明 ,其监测的介损、电容值等参数可对设备状况分析提供较可靠的依据 ,并及时发现了 8起电流互感器介损严重超标的缺陷更多还原

【Abstract】 Some of on line monitoring system of capacitive equipment used to detect tanδ and capacitance C were installed in one 500 kV substation and eight 220 kV substation in Beijing. The detected results are transmit to technical center from substation by communication cable. Up to now 9 systems have operated for 2 years and been proved useful foy evaluating insulation condition of capacitive equipment. 8CT of rated voltage of 220 kV or 500 kV, were detected by these system. The factors that affect the result of tanδ were carefully estimated through the analysis of each on-line monitoring system. The emphasis is given to the temperature characteristic of current signal transducer. Finally the analysis method was concluded.更多还原